Chemistry: Semester 1 Review

Multiple Choice

How does gravity depend on the mass of the two objects?

• Gravity decreases as the mass of the larger object increases.

• Gravity increases as the mass of either object increases.

• Gravity increases with the product of the mass and the distance.

• Gravity decreases as the mass of the smaller object increases.

Multiple Choice

In which direction does the electric field point at a position directly south of a positive charge?

• North

• East

• South

• West

Multiple Choice

Where is the north pole of the bar magnet, based on the magnetic field lines shown?

• On the left end

• On the right end

• On the top edge

• On the bottom edge

Multiple Choice

Which of the following is a form of kinetic energy?

• Chemical energy

• Thermal energy

• Elastic energy

• Gravitational potential energy

Multiple Choice

A brick of mass 5 kg is released from rest at a height of 3 m. How fast is it going when it hits the ground? (Assume no air resistance, $$g\ =\ 9.8\ \frac{m}{s^2}$$  )

Hint: $$PE\ =\ KE$$   ( $$mgh\ =\ \frac{1}{2}mv^2$$  )

• 7.2 m/s

• 7.7 m/s

• 8.1 m/s

• 9.9 m/s

Multiple Choice

What did Thomson discover?

• The proton

• The neutron

• The electron

• The nucleus

Multiple Choice

An atom of aluminum (Al) has an atomic number of 13 and a mass number of 27. How many neutrons does it have?

• 13

• 14

• 27

• 40

Multiple Choice

What do all the elements in one row of the periodic table have in common?

• They all have the same number of valence electrons.

• They all share the same physical properties.

• They all have similar chemical reactions.

• They all have the same number of core electrons.

Multiple Choice

Which of the following is a characteristic property of the noble gases?

• They react violently in water.

• They do not react chemically.

• They react violently in air.

• They only react with each other.

Multiple Choice

Which of the following notations is the correct noble gas configuration for Co?

• $$\left[Kr\right]4s^24p^64d^1$$  

• $$\left[Ar\right]4s^24p^63d^1$$  

• $$\left[Co\right]4s^23d^7$$  

• $$\left[Ar\right]4s^23d^7$$  

Multiple Choice

Which of the following diagrams is the correct electron dot diagram for S?

Multiple Choice

Which of the following is a result of intermolecular forces?

• Hydrogen bonds

• Covalent bonds

• Electronegativity

• Double bonds

Multiple Choice

What is a lone pair?

• A diatomic molecule attracted to no other molecule

• A pair of electrons that is not used in bonding

• Two atoms that have been pushed close to each other

• Two pairs of electrons that form a double bond

Multiple Choice

Which of the following is the correct name for $$Li_3N$$  ?

• Trilithium mononitride

• Lithium nitride

• Trilithium nitride

• Lithium mononitride

Multiple Choice

Which of the following is the empirical formula for $$C_4H_8$$  ?

• $$CH_4$$  

• $$C_2H_2$$  

• $$CH_2$$  

• $$C_6H_6$$  

Multiple Choice

How many Cl atoms are in $$Zn\left(ClO_3\right)_2$$  

• 1

• 2

• 3

• 6

Multiple Choice

What are hydrocarbons made of?

• Hydrogen and carbon

• Hydrogen, oxygen, and carbon

• Carbon and halogens

• Water and carbon

Multiple Choice

In the reaction: $$MgCl_2\ +\ 2KOH\ \rightarrow Mg\left(OH\right)_2\ +\ 2KCl$$  

If 6 moles of $$MgCl_2$$  are added to 6 moles of KOH, which is the limiting reagent?

• $$MgCl_2$$  

• KOH